Boring machine



l R. C. MRGAN BORING MACHINE Sept. ll, 1934.'

Filed Oct. 2l, 195i 5 Sheets-Sheet 1 R. C. MORGAN BORING MACHINE Sept.11, 1934.

Filed Oct. 21, 1951 3 Sheets-Sheet 2 R. C. MORGAN BORING MACHINE Sept.ll, 1934.

Filed OCC. 21, 1931 3 Sheets-Sheet v5 like@ 0. Marjan/Q Patented Sept.ll, 1934 BORINGl MACI'HNE Rees C. Morgan, Bethlehem, Pa., assigner toBethlehem Steel Com Pennsylvania Application October 21,

.27 Claims.

410 to the adjustable star-feeding devices for feeding the boring tools.Y

Another object of my invention relates to the manner of mounting androtating the central headstock of the spindle.

'15 Another object of my invention relatesto the manner ofadjustablyattaching the inner ends of the adjustable slide rest bars tothe central rotating headstock.

Another object of my invention relates tothe 12() adjustable means forsupporting the outer ends of the adjustable slide rest bars in such away as to enable me to obtain a Wide range of angular adjustment for theslide rest bars. ,y

Another object of my invention relates to the mechanism for adjustingand feeding the rests for the cutting tools.

Another object of myrinvention relates to the adjustable centering ringsfor centering or locating the device in the desired position on the Workbeing operated upon, and still another object of my invention relates tothe mechanism for automatically feeding the slide-rests and cuttingtools longitudinally in either direction on the slide-rest bars.A t

With the foregoing and other objects in view the invention comprises thenovel construction, combination and arrangement of parts hereinaftermore specically described and illustrated inthe accompanying Vthreesheets of drawings `-4:0v which forni a part of this specication and inwhich like charactersof reference indicate like parts: l

Figure 1 is a vertical longitudinal sectional elevation taken onthe linel--l of Fig. 2, illustrating the application of my boring machine in theposition it will assume when secured on` the end of an oilAcracking'cylinder at substantially the beginning'of the workingoperation with parts broken away to more clearly show its construction;Fig. 2 is an elevation of the front or operating end of the machine withpart of the worm gear housing and bearings therefor broken away;

Fig. 3 is a rear end elevation of my device illustrating the manner ofadjustably supporting the 554 same at this point by means Aof a tripod;y

pany, a corporation of 1931, serial No. 570,063 (el. w-zi Fig. 4 is adetail view showing the manner of securing the cross-bar to theheadstock, the headstock being in transverse section;

Fig. 5 is a detail View illustrating a shorter cross-bar attached to theheadstock near the rear end; I

Fig. 6 is a transverse section through the head-- stock taken on theline 6-6 of Fig. 1;

Fig. 7 is a detail section through a portion of the ring-gear andadjacent parts illustrating'the mannerof feeding lubricant to thering-gear;

Fig. 8 is a detail View illustrating the manner gf mounting the cuttingtools on the slide rest ars;

Fig. 9 is a detail vertical section of the parts shown in Fig. 8, thesection being takenon the line 9 9 of Fig. 10;

Fig. 10 is an end elevation, drawn on a larger scale of the outer end ofone of the slide rest bars and the mechanism attached thereto showingthe madnner of feedingand adjusting the cutting tool; an

Fig.11 is a detail View of the trippingV mechanism for engagement withone of the star-wheels.

Referring now to the various characters of reference on the drawings,the numeral 1 indicates onerof the end portions of an oil crackingcylinder or like vessel having a tapered portion'with an inner wall 2,reduced neck portion 3 having an outwardly extending flanged edgei, towhich is attached an annular member or ring 5 by means of bolts 6, threebeing preferably used to form a three point contact to avoid springingthe ring 5 and ring-gear housing 1,7 to Whichfit 'is attached. Thesebolts 6 as indicated in Fig. 1 are ,each threaded into the ring 5 andextend therefrom through holes 'l in the flanged edge 4 and securedthereto by means of a washer and nut 8. AEach bolt 6 has a convex andconcave washer 9 and 10 mounted thereon'between the ring 5y and thehanged edge 4 to allow foruneven surfaces on the Work to which the ringmay be applied. The ring is further provided with ears 11 which extendinwardly over the periphery of the edge 4, having set bolts threadedtherein 4as at 12, to allow for lateral adjustment of the ring 5in-relation to the work to which it maybe applied. Formed integrally andextending `downwardly from the lower edgeofthe ring 5 is a projection 13Ahaving a slot formed therein as at 14 for receiving a bolt 15 which isthreaded into an extension 16 of a ring-gear housing 17 and adapted toclamp the ring 5 tothe said ring-gear housing 17. A flange 18 extendsoutwardly from the lower edge of the projection 13, having perforationsformed therein for receiving the outer ends of stud-bolts 20 which arethreaded into the extension 16 with nuts 21 thereon for engaging theflange 18. A set-bolt 22 is threaded into a perforation formed centrallyin the flange 18 and engages the edge of the extension 16, said set-bolt22 being locked in position by means of a nut 23. VBy adjusting the bolt15, nuts 21, set-bolt 22 and nut 23 the ring-gear housing 17 may bevertically raised or lowered slightly to give a further adjustment tothe housing and the parts mounted thereon.

A ring-gear 24 having lateral extensions 25 is journaled in the housing17, said ring-gear meshing with a pinion 26, the shaft 27 of which, isformed integral therewithv and is journaled in bearings mounted on topof the ring-gear housing 17 and secured thereto.

A worm-gear 28 is keyed to the shaft 27 and meshes with a worm 29 formedwith a shaft 30 having a thrust bearing 30 mounted on one end, while theopposite end of said shaft is provided With a driving beltl pulley 31,as shown in Figs. 1 and 2, or it may have a direct gear drive ifdesired.

The ring-gear 24 isprovided with a central opening 32 which registerswith an opening 33 formed in the outer hollow cylindrical end 34 of 4theheadstock 35, said cylindrical outer end 34 of the headstock 35 beingsecured to the inner face of the ring-gear 24 by means of bolts 36.Formed integral therewith at the inner opposite side edges of the hollowcylindrical end 34 are flanges 37. The body portion of the headstock isformed integral with the cylindrical end 34 and comprises a central'webportion 38 extending to the `point marked 39 and flanged edges 40 and 41which are connected together integrally at their inner ends as at 42 andhas a cylindrical reduced end formed integral therewith as at 43 whichis journaled in a removable collarv 44 mounted in a tripod 45 forsupporting the inner end of the headstock.

The flanges 41 extend outwardly from the web 38 on opposite sidesthereof in staggered relation to each other and have slots 46 formedtherein extending from the flanges 37 to the end of the web 38. Screwthreaded rods 47 are journaled in the ilanges 37 and extend into theslots 46. Collars 48 on the screw threaded rods 47 are adapted to Yholdthem in position against longitudinal movement while its outer ends aresquared as at 49 to receive a wrench for turning the same. A slide restbar 50 is secured at its inner end to each of the inner faces of theflanges 41 by means of bolts 51, each of said bolts 51 having its bodyportion 52 squared to engage the slots 46 which form guides for thesame, and are provided with screw threaded perforations to receive thescrew threaded rods 47. The inner end of each of the bolts 51 having awasher 53 and nut 54 screwed thereon to hold them in position. Y

AThe slide rest bars extend outwardly from the headstock at an anglethereto and are supported near their outer ends by means of acrossbar'55 and bolted thereto as at 56. The crossbar 55 being formedwith slots 57 to allow for a greater or less angular adjustment for theslide rest bars. y cross-bar 55 is secured to the beveled projectingedges 58 of the flanges 41 and inclined surfaces 59 formed on thecross-bar 55 by means of clamps 60 which are secured thereto by means ofbolts 61.v This cross-bar 55 may be adjusted longitudinally onthe'headstock by means of a screw-shaft 62 which is threaded into thecross-bar 55 as at 63 and journaled in the cylindrical inner end 43 Asindicated in Figs. 1, 4, and 5 this of the headstock as at 64. Thejournal bearing 64 is formed with an enlargement as at 65 to receive acollar 66 formed on the screw-shaft 62 and thrust-washers 67 aredisposed on each side of the collar 66, the parts being retained inplace by means of an annular plate 68 secured to the inner end of theheadstock by bolts as at 69. The end of the screw shaft projects beyondthe annular plate 68 and is squared as at 70 to receive a wrench forturning the same. When it is desired to adjust the cross-bar 55longitudinally on the headstock the bolts 56 and 61 are unscrewedslightly and a wrench applied to the squared end portion 70 and thescrew-shaft 62 rotated in either direction to give the cross-bar 55 thedesired longitudinal adjustment on the headstock and thereby giving agreater or less lateral movement to the slide rest bars, after which thebolts 56 and 61 are tightened.

One side of each of the slide rest bars is formed with a dove-tailedslide-way 71 and grooved centrally as at 72 to receive a lead-screw 73,the inner end of which is journaled in a removable bearing 74 while eachof the outer ends are journaled in a fixed bearing 75 formed at theouter ends of the slide rest bars and extends beyond the same beingscrew-threaded as at 76 to receive a spacing nut 77 and squared as at 78to receive a starwheel 79.

A slide-rest 80 is mounted upon each of the dove-tailed slide-ways 71 ofthe slide rest bars having a downwardly projecting lug 81 extending intogroove 72, said lug 81 being perforated and screw-threaded as at 83 toengage the leadscrew 73. The slide-rest 80 is formed on its top surfacewith a dove-tailed slide-way for receiving a cross-rest 84 to the top ofwhich is clamped the cutting tool 85 by means of the clamping bars 86bolts 87 and nuts 88. An L-shaped ange 89 extends outwardly from thecross-rest 84 in which is journaled an adjusting screw 90 threaded intothe slide-rest 80 for adjusting the cross-rest thereon. A beveled pinion91 is mounted on the outer end of the adjusting screw 90 meshing with abevel pinion 92 which has its shaft 93 journaled in a projection 94projecting from the L- shaped flange 89 and has a cross hand lever 95mounted on its outer end for operating the same.

As stated above the reduced cylindrical inner end 43 of the headstock isjournaled in a removable collar 44 mounted in a tripod 45. The tripod isformed with an annular central portion 96 which surrounds the collar 44and is spaced apart therefrom by means of set-bolts 97 which are tappedinto the annular central portion of the tripod with their inner endsengaging a groove 98 formed around the periphery of the collar 44. Thesebolts after adjustment are locked in position by means of nuts 99. Theremovable collar 44 is further held against longitudinal movement bymeans of a flange 100 formed integral therewith at one side thereof,while the other side has a pair of cross bars 101 secured to the collar44 by means of bolts 102, the ends of said bars 101 projecting over theface of the annular central portion 96 of the tripod, The annularcentral portion 96 of the tripod has three equally spaced flattenedportions 103 on its periphery to which is attached by means of bolts 104the flanges 165 of the inner ends of the legs 106, 107 and 108 of thetripod. The outer ends of the tripod legs are formed with laterallyflanged edges 189 having set-bolts 110 extending therethrough forengaging the inner sides of the oil cracking cylinder 1. These set-boltsafter adjustment being locked in position by means of nuts 111.

A slide-Way 1l2 having beveled edges, is formed integral with the leg108 of the tripod to which is adjustably secured a slide 113 by means ofthe wedge block 114 stub bolts 115 and nuts 116. An angular bracket arm117 is attached to the slide 113 by means of bolts 118, the angularbracket arm 117 being slotted as at 119 to allow for longitudinalmovement. To the outer end of the bracket arm is adjustably secured bymeans of a bolt 120, a tripper 121 having extensions 122 for engagingtheteeth of the star-wheels 79 mounted on the ends of the lead-screws 73.

With each rotation of the headstock a tooth of each of the star-wheels79 is engaged by one of the extensions 122 and rotates the lead-screw 73a partial rotation thereby advancing or retracting the rests carryingthe cutting tools. The tripper 121 can be adjusted to any desiredposition so that the extensions 122 will be in alignment with thelead-screw '13 to engage the teeth of the star-wheels at any angle theslide rest bars may be set.

In Fig. 5 I have illustrated a cross-bar 55 attached to the headstocknear 'the inner end. This cross-bar is shorter than the one describedabove to allow the outer ends of the slide rest bars to be supportednearer the sides of the headstock, otherwise the structure is similarand the same reference numerals will apply thereto.

In mounting and assembling the boring machine on the end of the oilcracking cylinder 1, the tripod is detached from the machine, which maybe done by partially unscrewing the set-bolts 97. One of the legs isthen removed preferably 108 together with the set-bolts 97 at each sidethereof. The parts of the tripod can then be inserted through thereduced neck portion of the oil cracking cylinder and set up orassembled in the proper required position. The cross-bar 55 then has tobe detached from the headstock, this is done by removing vthe annularplate 68 and unscrewing the screw-shaft 62 from the threaded portion 63of the cross-bar 55. Bolts 56 are then unscrewed from the slide restbars and taken out and bolts 61 unscrewed to release the pressure of theclamps 60 on the lieadstock. The cross-bar 55 can then be remo-ved fromthe headstock. The slide rest bars are then adjusted to differentpositions by means of rotating one or both of the screw threaded rods 47to allow the parts mounted thereon to clear each other and are thenfolded into the headstock. The cross-bar 55 and the headstock can thenbe inserted into the oil cracking cylinder and the parts assembled andadjusted in the required position.

The operation of my boring machine is as follows:-Assuming that theparts are in the position indicated in Fig. 1 of the drawings and poweris applied to the worin shaft 30 by means of a motor drive or beltadapted to drive the pulley 31 shown on the drawings thereby rotatingthe worm 29 in either direction and imparting rotary motion to theworm-wheel 28, pinion 26, ring-gear 24 and headstock 35, As theheadstock 35 rotates carrying the slide rest bars 59 and cutting tools,a tooth of each star-wheeljQ which is` mounted on the outer ends of theleadscrew 73 is engaged by one of the extensions 122 thereby rotatingthe lead-screw 73 a partialrotation and feeding the rests carrying thecutting tools forward and inward until they reach the end of the taperor stroke. If desired the cutting tools may then be turned over so thatthe cutting edges will engage the work in the proper manner and thenadjusted by hand to move them slightly outward by means of the crosshand levers 95, the drive is then reversed and the rests and cuttingtools feed backward, downwardly and outwardly until they reach theposition indicated in Fig. l.

In this manner the cutting tools may be fed to the work up and down thetapered surface, the only thing requiring adjustment between each cut orstroke is to adjust the cutting tools by turning the cross hand levers95.

It will be noted `that the cutting tools are shown as mounted at theouter end of the crossrest 84 but it will be readily understood that thecutting tools may be secured to the cross-rests at the opposite end, orat any intermediate points thereon.

Although I have described and illustrated my invention in considerabledetail, I do not wish to be limited to the exact and specic details,thereof, as shown and described, but may use such modications in,substitutions for, or equivalents thereof, as are embraced within thescope of my invention or as pointed out in the claims.

Having thusv described my invention what I claim and desire to secure byLetters Patent is:

l. A boring machine comprising a headstock formed w h a body portionprovided with a central web and side flanges extending from both sidesof the web, a ring-gear secured to the outer end of the headstock andjournaled in a housing for supporting the outer end of headstock, atripod having a central adjustable collar for supporting the inner endof the headstock, means for rotating the ring-gear and headstcck, abracket adjustably mounted on one of the legs of the tripod, a tripperadjustably secured to the bracket, a slot formed in one of the flangeson each side of the web in staggered relation to each other, a screwthreaded rod mounted in each slot and journaled in the outer cylindricalend of the headstock, a bolt having a screw-threaded perforation forengaging each screw threaded rod, a'slide rest bar having its inner endpivoted to each 'of the bolts and extending outwardly therefrom at anangle thereto, a cross-bar having a central screw threaded perforationsecured. the headstock for support- '7 ing the of the slide rest bar,slots formed in the cross-bar, bolts passed through the slots andthreaded into the slide rest bars for adjusting the outer ends of theslide rest bars, a screw-shaft journaled in the inner cylindrical end ofthe headstock for engaging the central screw threaded perfor-ation inthe cross-bar for adjusting the cross-bar on the headstock, a slide-wayformed on each slide rest bar, a groove formed in each oi the slide restbars, a lead-screw mounted in each groove and journaled. in bearings ineach slide rest bar, a slide-rest mounted on each slide rest bar havinga projection perforated and screw threaded to engage the lead-screw, across-rest mounted on each slide-rest, a cutting tool secured to eachcross-rest, means for adjusting the crossrests and cutting toolslaterally lor the slide rest and a star-wheel mounted on each leadscrewand adapted to engage the tripper during the rotation of the head-stockfor feeding the 1 inner and outer cylindrical ends and nular membersecured to the housing and adapted to be attached to the work, a tripodfor supporting the inner end of the headstock provided with an annularcentral portion, a collar mounted in the annular central portion of thetripod adapted to form a journal bearingvfor the inner end of theheadstock, a groove extending around the periphery of the collar,set-bolts threaded into the annular central portion and projecting intothe groove for laterally adjusting the collar, means for rotating theheadstock, adjustable slide rest bars pivoted at their inner ends to theheadstock and adapted to extend outwardly therefrom at an angle parallelto the tapered surface operated upon, means for adjusting the innerpivoted ends of the slide rest bars longitudinally of the headstock,adjustable means for supporting the outer ends of the slide rest bars, alead-screw mounted on each slide rest bar, a slide mounted on each sliderest lea-r having a threaded connection with the lead-screw, a cuttingtool carried by each rest; a star-wheel secured to each of thelead-screws, and a tripper adapted to engage the star-wheel during therotation of the headstock.

3. A boring machine comprising a headstock, means for rotating theheadstock, a slide rest bar having one end pivoted to the headstock atan intermediate point and extending laterally and inwardly therefrom atan angle to the inner end of the headstock, a screw threaded rodjournaled in the headstock for adjusting the pivoted end of the sliderest bar longitudinally of the headstock, a cross-bar adapted forlongitudinal adjustment on the headstock for supporting the extendingend of the slide rest bar, a slide-rest having a cutting tool attachedthereto mounted on the slide rest bar, and a lead-screw journaled atboth ends in the slide rest bars for feeding the slide-rest on the sliderest bar.

4. A boring machine comprising a headstock, means for rotating theheadstock, a pair of oppositely disposed slide rest bars each pivotedindependently of each other at one end to the headstoel; at anintermediate point and extending laterally and inwardly therefrom at anoblique angle to the inner end of the headstock, screwthreaded rodsmounted in the headstock for adjusting the pivoted ends of the sliderest bars longitudinally of the headstock, a cross-bar for supportingthe inwardly extending ends of the slide rest bars, a slide-rest havinga cutting tool carried thereby attached to each slide rest bar, andmeans for feeding the slide-rests on the slide rest bars.

5. A boring machine comprising a headstock, means for rotating theheadstock, slide rest bars each pivoted independently of each other atone end to the headstock at an intermediate point and extendinglaterally and inwardly therefrom j, at an oblique angle to the inner endof the headstock, screw threaded rods journaled in the headstock foradjusting the pivoted ends of the slide rest bars longitudinally of theheadstock, an adjustable cross-bar mounted on the headstock forsupporting the inwardly extending ends of the slide rest bars, aslide-rest having a cutting tool attached thereto mounted on each sliderest bar, and a lead journaled in each slide rest bar for feeding eachslide-rest.

6. A boring machine comprising a headstock, means for rotating theheadstock, slide rest hars each having one end adjustably pivoted to theheadstock at an intermediate point and adapted to extend laterally andinwardly therefrom at an angle to the inner end of the headstock, anadjustable cross-bar for supporting the inwardly extending ends of theslide rest bars, screw threaded rods journaled in the headstocl foradjusting the pivoted ends of the slide rest bars, a slide-rest providedwith a cutting tool mounted on each slide rest bar, and automatic meansfor independently feeding each of the slide-rests on each of the sliderest bars.

7. A boring machine comprising a headstock, means for rotating theheadstock, slide rest bars each pivoted at one end to the headstock atan intermediate point and extending laterally and inwardly therefrom atan angle to the inner end of the headstock, an adjustable cross-bar forsupporting the extending end portions of the slide '90 rest bars, screwthreaded rods journaled in the headstocl: for independently adjustingeach of the pivoted ends of the slide rest bars longitudinally on theheadstock, a slide-rest mounted on each slide rest bar, a cross-restadjustably mounted on each slide-rest, a cutting tool secured to eachcross-rest, and automatic means for independently feeding eachslide-rest on each of the slide rest bars.

8. A boring machine comprising a headstock, means for rotating theheadstock, a pair of slide rest bars each pivoted at one end to theheadstock at an intermediate point and extending laterally and inwardlyfrom opposite sides thereof at an angle to the inner end of theheadstock, means journaled in the headstock for independently adjustingeach of the pivoted ends of the slide rest bars longitudinally on theheadstock, a cross-bar mounted on the headstock for supporting theinwardly extending ends o-f the slide rest bars, a slide-rest having across-rest carrying a cutting tool mounted on each slide rest bar, andautomatic means for independently feeding each slide-rest longitudinallyon each of the slide rest bars.

9. A boring machine comprising a headstock, a pair of slide rest barseach pivoted at one end to the headstock at an intermediate point andextending laterally and inwardly from opposite sides thereof at an angleto the inner end of the headstock, screw threaded rods journaled in theheadstock for independently adjusting each of the pivoted ends of theslide rest bars longitudinally on the headstock, a cross-bar mounted onthe headstock for supporting the inwardly extending end m5 portions ofthe slide rest bars, a screw-shaft journaled in the inner end of theheadstock for adjusting the cross-bar longitudinally of the headstock,

a slide-rest and a cross-rest provided with a cutting tool mounted oneach of the slide rest bars, and automatic means for independentlyfeeding each slide-rest longitudinally on each of the slide rest bars.

l0. A boring machine comprising a headstock, means for rotating theheadstock, means for latf5 erally adjusting the headstock, a pair ofslide rest bars each adjustably pivoted at one end to the headstock andprojecting laterally and inwardly at opposite sides therefrom at anangle to the inner end of the headstock, a cross-bar mounted on theheadstock for supporting the inwardly extending ends of the slide resthars, means journaled in the inner end of the headstock for adjustingthe crass-bar longitudinally of the headstock, means for adjusting theinwardly extending ends of the slide rest bars independently of eachother on the cross-bar, a slide-rest mounted on eac'n of the slide restbars, a cross-rest adjustably mounted on each slide-rest, and means forintermittently feeding the slide-rests independently of each other 1Fgi] longitudinally in either direction on the slide rest bars.

11. A boring machine comprising a headstock, a ring-gear secured to theouter end of the headstock, a housing surrounding the ring-gear, lateralextensions on the ring-gear journaled in the housing, means connected tothe work operated upon for supporting the housing, a pinion journaled inthe housing connected .with power means for rotating the ring-gear andheadstock, a pair of slide rest bars each adjustably pivoted at one endto the headstock and adapted to extend .laterally and inwardly therefromat an angle thereto from each side of the headstock, a rcross-harmounted on the headstock for supporting the laterally extending ends ofthe slide rest bars, means for adjusting the cross-bar longitudinally ofthe headstock, a slide-rest mounted on each slide rest bar, a cuttingtool mounted on each `slide-rest, a leadscrew journaled in each sliderest har having a threaded connection with the slide-rest, means forsupporting the inner end of the headstock, a star-wheel secured to oneend of the lead-Screw, .and a tripper adapted to engage the star-wheeland rotate the lead-screw for intermittently feeding the slide-restslongitudinally on the slide rest bars.

l2. A boring machine comprising a headstock, means for adjustablysupporting the innerl end of the headstock, va ring-gear secured to theouter Vend of the headstock, a housing surrounding the ring-gear,lateral annular extensions projecting from each side of thering-gearjournaled in the housing, means connectedto the work operated upon forsupporting the housing, means `for rotating the ring-gear and headstock,screw threaded rods journaled in each side ofthe headstook, a slide restbar having one end adjustahly pivoted to one offthescrew threaded rodsand extending laterally and inwardly therefrom .at an angle on oppositesides near the inner end of the headstock, a crossbar secured to theheadstock for adjustably supporting the laterally extending ends oftheslide rest bars, means for .adjusting the cross-bar on the headstock, aslide-rest carrying a cutting tool vmounted on each slide rest bar, alead-screw mounted in each slide rest bar having a threaded connectionwith each slide-rest, a star-wheel attached to .each of the lead-screws,and a tripper for engaging the star-wheel during the `rotation of theheadstock for feeding the :slide-rests longitudinally in eitherdirection .on the slide rest hars.

13. A .boring machine comprising a headstock, means secured to the workoperated upon for supporting the ends ,of the headstock, means forrotating the headstock, a slide rest bar extending from opposite sidesof the headstock each having one of their ends pivotally secured to theheadstock at an intermediate point and extending laterally and inwardly.therefrom at an oblique angle to the inner end of the headstock, anadjustable cross-bar for supporting the laterally extending ends .of theslide rest bars, screw threaded rods for adjusting the pivoted ends ofthe slide rest bars longitudinally on the headstock, a slide-restmounted on each slide rest bar, a cutting tool carried by eachslide-rest, and means for feeding the slide-rests longitudinally `ineither direction on .the slide restfbars.

14. A Vlooring machine comprising .a headstock, means for supporting theinner and outer ends ofthe headstock, means for rotating the headstock,a slide rest har having .one end pivotally connected to the oppositesides of the headstock 'at an intermediate .point in staggered-.relationto each other and adapted to extend laterally and inwardly therefrom atan oblique angle to the inner end of the headstock, screw threaded rodsfor adjusting the pivoted ends of the slide rest bars longitudinally ofthe headstock, adjustable means for supporting the laterally extendingends of the slide rest bars, a cutting tool mounted on each of the sliderest bars', means operated during the rotation of the headstock forlfeeding the cutting tools longitudinallyV on the slide rest bars, andindependent means for laterally adjusting the cutting tools, Y .Y

15. A boring machine comprising a headstock, means for adjustablysupporting the inner and outer ends of the headstock, means for rotating90 the headstock, a slide rest bar extending laterally and inwardly fromopposite sides .of the headstock each pivotally attached at one end tosaid headstock at an intermediate point,V screw threaded rods foradjusting longitudinally of the headstock .95 the pivotal connectionsfor the inner' ends ofthe slide rest hars, a cross-bar mounted on theheadstock for adjustably supporting the laterally extending ends of theslide rest bars, a cutting tool carried by each slide rest bar, andmeans operated during the rotation of the headstock for feeding thecutting tools longitudinally .on the slide rest bars.

V16.` In a machine for boring Vthe interior tapered wall surfaces ofstills or the like `petti/'een the body 105 and reduced neck portions,comprising aheadstock adapted to be introduced .into the still throughthe neck, means for supporting the inner and outer ends of the headstockon the still, means for rotating the headstock, a pair of oppositely1.10 inclined slide rest bars eachA having one end pivoted to theheadstock at an intermediate point, said slide rest bars extendinglaterally and inwardly therefrom .at each side of the inner end of theheadstock at an angle thereto and in parallel 1,15 relation to theinterior tapered wall surface ofthe still, a slide-rest mounted on eachslide rest bar,

a cutting tool carried by each slide-rest, and means for feeding theslide-rests longitudinali-y on the slide rest bars during the rotationYofthe 1x20 rporting the outer end of the headstock on the neck, meansfor rotating the headstock, a pair` of oppositely inclined slide resthars each having ,13g one end piVoted to opposite sides of the headstockat an intermediate point, said slide rest :bars extending laterally andinwardly therefrom at each side of the inner end of the headstock at anangle thereto and in parallel relation to the interior135 tapered wallsurface of the still, means for sup` porting the laterally extendingends of the slide rest bars, `means for adjusting the slide rest barstoward or away from the tapered side walls 4of the still, a slide-restmounted on each slide rest 14@ har.,r a cross-rest mounted on theslide-rest, a

cutting tool carried `by each cross-rest, means for feeding4 ,theslide-rests longitudinally on the slide rest `hars during the rotationof the headstock, and means for feeding the cross-rest trans- 145yersely of .the slide rest lloars.` y

18. In a machine for boring the interior tapered wall surfaces of stillsor the like .between t-he bojdy and reduced neck portions, comprising aheadstock adapted to be `introduced into Vthe still 150 ,slot having oneend journaled in the headstock,

a slide rest bar pivoted at one end to each of the screw threaded rodsand extending laterally Vand inwardly therefrom in opposite directionsat `eachY side of the inner end of the headstock at an anglethereto andin parallel relation to the interior tapered wall surface of the still,a cross- ,bar Vfor supporting the laterally extending ends of the sliderest bars, means for adjusting the pivoted and laterally extending endsof the slide 'rest barstoward or away from the tapered side walls of thestill,-a slide-rest mounted on each slide rest bar, a cross-rest mountedon the sliderest, a cutting tool carried by each cross-rest, means forfeeding the slide-rests longitudinally 'on the slide rest bars duringthe rotation of the headstock, means for feeding the cross-rest carryingthe cutting tool transversely of the slide rest bars, and means forrotating the headstock.

' 19. In amachine for boring the interior tapered end wall surfacesV ofstills or the like between the body and reduced neck portions,comprising a headstock adapted to be introduced into the still throughthe neck, means for supporting the inner end of the headstock in thestill, means connected to the neck adapted to support and rotate theheadstock, a pair of oppositely inclined slide rest bars each having oneend pivoted to theheadstock at an intermediate point and extendinglaterally and inwardly therefrom at an angle to the inner end of theheadstock and in parallel relation to the interior tapered end Wallsurface ofthe still, a cross-bar mounted on the headstock for supportingthe laterally extending ends of the slide rest bars, a screw-shaftjournaled in the headstock for adjusting the cross-bar, means foradjusting the pivoted ends of the slide rest '-bars, a slide-restmounted on each slide rest bar,

a cross-rest mounted on the slide-rest, a cutting tool carried by eachcross-rest, means for feeding the slide-rests longitudinally on theslide rest bars during the rotation of the headstock, and

independent means for feeding the cross-rest transversely of the sliderest bars.

2i). In Va machine for boring the interior tapered end wall surfacesofstills or the like between the body and reducedv neck portions;comprising a headstock adapted to be introduced into the still throughthe neck, means for supporting the inner end of the headstock in thestill, means connected to the neck adapted to support the outer endofthe headstock, a ring-gear secured to the outer end of the headstock,means for rotating the ring-gear and headstock, a slide rest barpivotally secured at one end to each side of the headstock at anintermediate point and extending laterally and inwardly therefrom at anangle thereto and in parallel relation with the interior tapered endwall surface of the still, a cross-bar adjustably mounted on theheadstock for supporting the laterally projecting endsl of the sliderest bars, means independent of each other for adjusting the ends of theslide rest bars and the angle of the slide rest bars in relation to theheadstock, a slide-rest mounted on each slide rest bar, a cross-restmounted on each sliderest, a cutting tool secured to each cross-rest,

bars during the rotation of the headstock, and

bodyand reduced neck portions, comprising a means for feedingthe'cross-rests 'carrying the cutting tools transversely of the sliderest bars.

21. In a machine for boring the interior tapered end wall surfaces ofstills or the like between the headstock adapted to be introduced intothe still through the neck, adjustable means for supporting the innerend of the headstock in the still, adjustable means connected to theneck adapted to support the outer end of the headstock, :a ring-gearsecured to the outer end of the headstock, a housing surrounding thering-gear, annular lateral extensions formed on the ring-gear journaledin the-housing, a driving pinion meshing with the ring-gear having itsshaft journaled in the housing, a pair of oppositely inclined slide restbars arranged centrally of ,the headstock, each of said slide rest barshaving one end pivoted at an intermediate point to the headstock andextending laterally and inwardly therefrom at an angle parallel with thetapered end wall surface of the still, a cross-bar mounted-on theheadstock for supporting the laterally extending end of the slide restbars, a slide-rest mounted on each slide rest bar, a cutting toolcarried by each slide-rest, and means for feeding the slide-restslongitudinally on the slide-rest bars during the rotation of theheadstock. l l

22. In a machine for boring tapered surfaces, comprising a headstock,journal bearings for supporting the ends of the headstock, means forrotating the headstock in the journal bearings,

a pair of oppositely inclined slide rest oars centrally disposed andpivoted at one of their ends to the headstock and adapted to extendlaterally and inwardly therefrom on each side of the headstock at anangle parallel to the tapered surface operated upon, screw threaded rodsfor adjusting the inner pivoted ends of the slide rest barslongitudinally on the headstock, an adjustable crossbar for supportingthe laterally extending ends of the slide rest bars, a lead-screwmounted on each slide rest bar, a slide-rest mounted on each slide restbar having a threaded connectionwith the lead-screw, a cutting toolcarried byeach vslderest, astar-wheel secured to 'each of theleadscrews, and a tripper'adapted to engage the starwheel to 4rotate thelead-screws for feeding the slide-rests longitudinally on the sliderestbars during the rotation or" the headstock.

23. In -a machine for boring tapered surfaces, comprising a headstock,means for supporting the inner and outer ends of the headstock, meansfor rotating the headstock, al pair'of screw threaded rods journaled inthe headstock, a pair of oppositely inclined slide rest bars centrallydisposed in relation to the headstock, each pivoted at one of their endsto one of the screw threaded rods and adapted to extend laterally andinwardly therefrom on each side of the headstock atan angle parallel tothe tapered surface operated upon, a bolt having a threaded'connectionwith the screw threadedA rods for adjusting the -inner ends of each ofthe slide rest bars longitudinally on the headstock, a cross-barmountedl on them@ headstock for supporting the laterally extending endsof the sliderestbarsya' screw-shaftl journaled in the headstock having athreaded connection with the cross-bars adapted to adjust the cross-barlongitudinally on the headstock, a lead-.145 screw mounted oneachslide'rest bar, a slide-rest mounted on each slide rest bar having athreaded connection with the lead-screw, a cutting tool carried by eachslide-resta star-wheel secured .to-each off the lead-screws, .and atripper adaptedl to engage the star-wheel to rotate the lead-screws forfeeding the slide-rests longitudinally on the slide rest bars during therotation of the headstock.

24. In a machine for boring tapered surfaces, comprising a headstockhaving a hollow cylindrical outer end and a reduced cylindrical innerend, spaced flanges connecting the cylindrical ends of the headstocktogether, a web extending from the cylindrical outer end to a point nearthe center of the headstock for connecting the flanges together, a pairof oppositely inclined slide rest bars each having one end pivoted tothe headstock between the flanges at an intermediate point and adaptedto extend laterally and inwardly therefrom on each side of theheadstock, and means for adjusting the slide rest bars whereby they maybe folded into the body of the headstock.

25. A boring machine comprising a headstock, means for supporting theends of the headstock, means for rotating the headstock, a pair ofoppositely inclined slide rest bars each pivoted at one end to theheaclstocl: at an intermediate peint and extending laterally therefromon opposite sides at an angle thereto, means for independently adjustingthe pivoted ends oi the slide rest bars longitudinally of the headstock,means mounted on the headstock for supporting the laterally extendingends of the slide rest bars, a lead-screw journaled in bearings mountedin each slide rest bar, a slide-rest having a threaded engagement witheach of the lead-screws, a cutting tool carried by each slide-rest, astar-wheel secured to each lead-screw, and a tripper for engaging thestar-wheel to rotate the lead-- screws for feeding the slide-restslongitudinally on the slide rest bars during the rotation of theheadstock.

26. A boring machine comprising a headstock, means for supporting theheadstock, means for rotating the headstock, a pair of oppositelyinclined slide rest bars each independently pivoted at one end to theheadstock at an intermediate point and extending laterally and inwardlytherefrom at an angle thereto, screw threaded rods for adjusting thepivoted ends of the slide rest bars longitudinally of the headstock,cutting tools carried by the slide rest bars, and an adjustablecross-bar for supporting the laterally extending ends of the slide restbars.

27, A boring machine comprising a headstock, means for supporting theends of the headstock on the work operated upon, means for rotating theheadstock, a pair of oppositely inclined slide rest bars each pivoted atone end to the headstock at an intermediate point and extendinglaterally and inwardly therefrom at an angle thereto, means foradjusting the pivoted ends of the slide rest bars longitudinally of theheadstock, a slide-rest mounted on each slide rest bar, a cutting toolcarried by each of the sliderests, means for automatically feeding eachsliderest longitudinally on the slide rest bars during the rotation ofthe headstock, a cross-bar secured to the headstock for supporting thelaterally eX- tending ends of the slide rest bars, a screw-shaftthreaded into the cross-bar and journaled in the headstoclc foradjusting the cross-bar on the headstock, and means for adjusting thelaterally extending ends of the slide rest bars on the cross-bar.

REES C. MORGAN.

Mil

CERTIFICATE 0F CORRECTIN.

Patent No. 1,973,36. September 11, 1934.

REES C. MORGAN.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 4,line 68, claim 5, before "journaled" insert screw; and that the saidLetters Patent should be read with this correction therein that the samemay conform to the record ot the case in the Patent Office.

Signed and sealed this 30th day of October, A. D. 1934.

Les l ie Frazer (Seal) Acting Commissioner of Patents.

